Coke oven door



Allg' 20, 1957 sADAo sHlMAzAKl COKE OVEN DOOR 2 Shsets-Sht l Filed DSG. 17, 1952 SI2-Ja() ATTORNEYS -\1g 20, 1957 sADA SHIMAZAKI 2,803,592

COKE OVEN DOOR Filed Dec. 17, 1952 2 Sheets-Sheet 2 A TTORNEYJ LUlllil@ This invention relates to a coke oven door and one object of the invention is to make the closure tight between the frame of a door and margins of the lid of `the door when the frame of the oven or the door 'is more or less deformed because the coke oven has been used for a long time.

Another object of the invention is to make it easy to remove the lid of the door and the door frame of the oven for repa-irs.

Another object of the invention is to reduce radiation of heat from the outside of the door and thereby make easier the operation of handling the door; to make it easy for the oven door to be attached to the oven; to be `able by only one operation to open and close the door and to increase and reduce the pressure of the body continually and automatically; and moreover, to make it possible to close the oven by pressing the door to the frame.

The invention is illustrated in the accompanying drawings wherein:

Figure l is a `front View.

Figure 2 is a view taken longitudinally through Figure 1, portions being shown in section and other portions in side elevation.

Figure 3 is a transverse `sectional View taken on the line IIIIII of Figure l.

This invention consists of improvements in the construction of a door structure for a coke oven which is in dicated in general by the numeral 1 and formed with a tubular door opening 1t5L bordered by a door frame 2 having side bars and end bars. The side bars carry keepers or holders 3 spaced from their upper ends and also carry sets of outwardly projecting hooks 6, one set of hooks being located above the 'holders 3 and the other lset of hooks being spaced upwardly a short distance `from the lower ends of the side bars. A passage 25 for water and air is formed through the frame and has an upper inlet 26 and lower outlets 26a.

The door 4 comprises a stiff metal plate or lid 49 which is iirmly secured against the outer surface of a hollow plug body 4b 'by bolts 4, and referring to Figure 3 it will be seen that the plug 4b is of such dimensions that it lits within the chamber opening 1a w-hen the door is closed. Insulation 3 is packed into the door body and along opposite side edge portions of the door plate 4a are angle metal bars 7 which are mounted against the inner surface of the plate and have flanges projecting from the door formed `with knife edges which bear against the outer surface of the frame 2 when the door is closed and provide a tight joint between the door and the frame. Rollers are mounted at opposite `sides of the door upon ends of a plate 5a and engage with the holders 3 when the door is in closing relation to the frame 2. The numeral 13 designates a rectangular frame formed from a bar of channel metal and having the long side bars 13a to and between which, at the upper and lower ends of the frame, are secured cross bars or bridging bars 20. Each bridging bar has a web portion 29a midway its ends lying in a cleft or slot for-med in a bracket b j 2,803,592 Patented Anga 20, 1957 which is secured against the door plate by the bolts 11. An elongated opening or slot 18 is formed through the web portion 20a of each bridging `bar Ztl to accommodate a bolt 21 which passes vertically through the companion bracket 20h and `thus permit the door and the bridging bars to have limited movement relative to each other.

A stud 19 projects outwardly from each bridging bar Z0 midway its ends and each of these studs passes through la sleeve 23 which is exterially threaded and has Ia wrench engaging head 23a constituting a nut by means of which the` sleeve may zbe turned when necessary. The numerals 22 designate upper and lower clamping bars each of which is formed with a threaded bore to receive the companionts'leeve 23 and ends of the clamping bars engage with the hooks 6 'which are secured as at 6a to the ad jacent sides of the frame 2. When the sleeves are turned by engagement of a wrench with the nuts 23a the clamping bars will be shifted longitudinally of the studs 19 and the clamping bars moved into or out of binding engagement with the hooks. A small nut 24 screwed upon `the outer end of each Vstud holds the threaded sleeve 23 and its head -or nut 23a upon the stud. By shifting the sleeves along the studs pressure upon the door will be controlled. Each bracket Zlib embodies a pair of spaced ears 10B' extending down therefrom, between which eX- tends a bar 9 for engagement by a door lifting hook, designated 1Gb. These hooks engage about bars or rods 9 extending between and carried by legs of the frame 13 and extending across the door.

'Pressure upon the door to form a tight joint between the flanges 7 and the frame 2 is applied by spring loaded means carried by the frame 13 and spaced from each lother in the longitudinal direction of the frame `which connects the side bars 13a and along the transverse bottom part of the frame.

Each of the spring loaded means is formed as `shown in Figures 2 and 3 and upon reference to Figure 3 it will be seen that each such means comprises a casing 14 rigidly mounted in and across the channel of the channel bar of which the frame 2 is formed and each casing is open along its outer side as shown both in Figure 2 and Figure 3. A plunger 16 is slidable :longitudinally through the casing 14 with its inner end portion passing through a guide 14a at the inner end of the casing and this plunger is threaded for a portion of its length and carries a plate or washer 17 lwhich thereby is -shiftable along the plunger. A helical spring 15 about the plunger Ihas one end bearing against the outer end of the casing 14 and its other end engaging the washer 17 and by turning the` washer to move it along the plunger tension of the spring may be adjusted. When the door is in a closed position and the clamping bars 22 are each en- -gaged with the hooks 6, the nut or sleeve 23 is turned to effect binding grip between ends of a bar and the hooks engaged Iby it and the door will be shifted inwardly of the door opening l.EL and edges of the llanges 7 will be pressed tightly against the frame 2 by the plungers 16 by the springs 1S which are compressed and maintained under tension as shown in Figure 3.

The door 4 terminates at its top in downwardly spaced relation to the upper end of the door frame 2 and through this space is disposed the hollow casing or frame 27 of a leveling device, the casing being surrounded by a ilange 272t which is firmly secured to the adjacent top portion ofthe plate da. The casing 27 has its outer end closed by a plate or door 31 across which extends a rocker bar 28 having an upper end pivotally mounted about a shaft or rod 29 and having a lower end portion formed with a sloping portion 3d. The door 31 is connected with the bar 2S by a bolt 32. Ears 33 and 34 are carried by the door 31 and through these ears are mounted shafts 38. Fittings 37 at opposite sides of the easing or frame 27 carry a U-shaped handle 36 which has its arms pivoted to the ttings and each tting is of a bell crank formation and carries at one end a stop 3S engaging :across an adjacent shaft 38 and at its other end a roller 39 engaging a plate Aillrmounted against a side of the 'casing 27. Against the front lower side of the casing l'27 and midway the width thereof is pivotally mounted a lever 45 consisting of two spaced arms through which pass a pivot shaft 48 carried by a bracket 47 fixed to the casing. A roller 49 is rotatably mounted between outer ends of the arms of the lever'45 by a pin or shaft '58 and this roller is engaged by the sloping end 30 of the arms 28. At their inner ends the bars forming the lever 45 carry a rod or pin 46 which projects from opposite sides of the lever and carries weights 44. Links or bars 42 are mounted upon opposite ends of the rod 46 and these links extend' upwardly at a forward incline and at their upper ends are pivoted to plates 51 by pins 43. The plates 51 extend from upper ends of the shafts 38 and have arcuate edges 53. Pins 52 extend laterally from the plates 51 and contact plates 54 in which indentations are formed and serve as latches which resist movement of the plates 51 relative to the plates 54.

I will explain the function of this invention n detail. When the door-lifter is hung to the connector bars 9, the knife-edges of the flanges 7 carried by the plate 4a touch the frame 2 of the oven, and when each of the clamping bars 22 is rotated, both ends of the bars are engaged with the cooperating hooks 6 and thus the spring pressed plungers 16, which are supported between side bars 13a of the frame 13, press the plate 4, so the bars 22 and the flanges 7, cooperate to close the oven tightly.

Besides, I will explain the function of the leveler bar door 31. In order to open the leveler bar door, the bar of the pusher is coupled to the handle 36. When the shafts 38 are slid upward, the lever 45 is tilted around the shaft 48 by means of the bars or links 42 which are attached to the upper part of the shafts 38, and then the roller 49 which is mounted on the lever 45 is moved out of engagement with the sloping end 30 of the rocker bar 28 and thus the pressure on the door 31 is removed. At the same time, the rollers 39 carried by the metal fittings 37 which fit up close to the shafts 38 will touch the sloping portions of the plates 41 which are mounted at opposite sides of the frame 27, and strip off tar which causes sticking between the frame 27 and the door 31. Moreover, when the shafts 38 are slid upward, the stoppers 35 will hit the bosses 33 mounted near opposite sides of the door 31, and the door 31 is opened.

At the same time, the pins 52 will ride onto the arcuate edges 53 of the plates 54 when the door is opened and prevent the door 31 from closing. On the contrary, when the leveler bar door 31 is going to be shut, the door 31 is engaged with the casing 27, and then as the shafts 38 are slid downward by the weights 44, the lever 45 is swung around the shaft 48 by means of the bars or links 42, and the roller 49 which is carried by the lever 45 will engage the sloping portion 30 on the lower part of the rocker bar 28, and thus the door 31 will be applied with pressure to the front of the frame 27 with the roller 49 by means of the weight 44.

As the knife-edge or iiange 7 of the lid 4 is held in close fitting engagement with the front of the frame 2 of the door by the springs 15, if distortion of the portion of the frame 2 or the flange 7 of the lid 4 has taken place as the result of the oven being used for a long time, the closure between the frame 2 of the door and the portion of the flange 7 is very good.

Till now, it has been diiicult to remove the lid 4 from the frame 13 but, in this improved construction, the closure can be easily separated into two parts when the bolt 21 is removed and repairs easily made. When some trouble arises in this improved device if the small nut 23 is rotated with a wrench, the bar 22 being tixed,

the walls of the slot 18 engage the bolt 21 on account of the advance of the holder 28, and the force of the springs 15 will be ineffective and the bar 22 can be rotated by a persons hand. Therefore, when some trouble arises, it is unnecessary to prepare installations in order to make repairs on a large scale.

As the entrances or ports 26 and 26a are at the upper and lower ends of the frame 2, after the insulation 8 has been applied inside the lid 4, the passage 25 in the frame 2 constitutes the passage for air or water. After the air is removed from passage 25, the heat in the oven is less radiated, and repair operations outside the oven will be easy to do, and yet, as the frame is cooled by passing air and water through the passage 25 this improved construction does not have the defect of releasing the connection of the frame 2 from the flange 7 when the frame 2 is deformed.

Still, as the rollers 5 are installed at the right and left side edges of the lid 4 and the lid is hung, after the rollers 5 are inserted in the projection 3 of the frame 2 of the door, the lid 4 can be easily installed and it will be held in cooperation with the frame 2.

Moreover, both the increase and decrease of pressure and the opening and shutting of the door 31 can be done by only one operation, and yet closing of the oven can be done as the door 31 is accurately pressed against the frame 27 of the leveling-door.

Having thus described about my invention, what I claim as new is:

l. A coke oven door structure comprising a rst door frame, a door disposed in front of and covering the opening defined by the frame, hooks connected to opposite sides of the frame and adapted to extend outwardly therefrom, a second frame disposed in front of said door between said hooks, bridging bars disposed horizontally within the second frame, said door embodying a plate and bordering flanges about the perimeter thereof, the anges bearing against opposing surfaces of the iirst frame, forwardly projecting brackets secured to the front of the door, each bracket having a forwardly opening slot loosely receiving a portion of a bridging bar whereby the second frame and bridging bars are fully detachably joined to and supported by the door, clamping cross bars each disposed across the second frame in front of a bridging bar and formed intermediate its ends with a threaded opening, a nut carrying sleeve threaded in each threaded opening and having a portion bearing against the side o-f the clamping bar remote from the bridging bar, a stud extending forwardly from each bridging bar through the adjacent sleeve for rotation of the sleeve thereon, a removable bolt coupling each bracket and the received portion of the adjacent bridging bar, the bolt coupled bracket and bridging bar b'elng relatively movable, and a plurality of spring loaded pins supported by and around the second frame and pressed against the door around and adjacent to the perimeter of the latter, the movable relationship of the bracket and bridging bar permitting the second frame to move toward the door upon rotation of the threaded sleeves in one direction on the studs.

2. The invention according to claim 1 with a multiplicity of housings supported by the second frame for enclosing said spring loaded pins, each of the spring loaded pins embodying a coil spring encased in a housing and a thrust pin supported by opposite ends of the housing for axial movement therein, the encased spring in each housing bearing at one end against an end wall of the housing remote from the adjacent door and bearing at its opposite end against a washer encircling and threaded on the thrust pin, said thrust pins being formed at their outer ends to facilitate rotation whereby to effect movement of the threaded washer thereon for altering the tension of the spring.

3. The invention according to claim 1, with a pair of oppositely positioned rollers carried upon the outer sides A AA 444-* of the second frame to tui-r1 about a common axis extending transversely of the frame and supporting holders carried by the rst frame in position to have said rollers rest thereon when the door structure is in operative position.

4. The invention according to claim 1, with depending spaced ears carried by each bracket and a lift bar mounted horizontally between each pair of ears and adapted to be engaged by lifting mechanism.

References Cited in the le of this patent UNITED STATES PATENTS Moore Apr. 2l, Moore Apr. 21, Koppers Nov. 19, Bareuter Apr. 14, Freeman Mar. 25, Wilputte Apr. 15, Grasshotl Aug. 5,

Van Ackeren Aug. 9, 

1. A COKE OVEN DOOR STRUCTURE COMPRISING A FIRST DOOR FRAME, A DOOR DISPOSED IN FRONT OF SAID COVERING THE OPENING DEFINED BY THE FRAME, HOOKS CONNECTED TO OPPOSITE SIDES OF THE FRAME AND ADAPTED TO EXTEND OUTWARDLY THEREFROM, A SECOND FRAME DISPOSED IN FRONT OF SAID DOOR BETWEEN SAID HOOKS, BRIDGING BARS DISPOSED HORIZONTALLY WITHIN THE SECOND FRAME, SAID DOOR EMBODYING A PLATE AND BORDERING FLANGES ABOUT THE PERIMETER THEREOF THE FLANGES BEARING AGAINST OPPOSING SUSRFACES OF THE FIRST FRAME, FORWARDLY PROJECTING BRACKETS SECURED TO THE FRONTT OF THE DOOR, EACH BRACKET HAVING A FORWARDLY OPENING SLOT LOOSELY RECEIVING A PORTION OF THE BRIDGING BAR WHERE-BY THE SECOND FRAME AND BRIDGING BARS ARE FULLY DETACHABLY JOINED TO AND SUPPORTED BY THE DOOR, CLAMPING CROSS BARS EACH DISPOSED ACROSS THE SECOND FRAME IN FRONT OF A BRIDGING BAR AND FORMED INTERMEDIATE ITS ENDS WITH A THREADED OPENING,A NUT CARRYING SLEEVE THREADED IN EACH THREADED OPENING AND HAVING A PORTION BEARING AGAINST THE SIDE OF THE CLAMPING BAR REMOTE FROM THE BRIDGING BAR, A STUD EXTENDING FOWARDLY FROM EACH BRIDGING BAR THROUGH THE ADJACENT SLEEVE FOR ROTATION OF THE SLEEVE THEREON, A REMOVABLE BOLT COUPLING EACH BRACKET AND THE RECEIVED PORTION OF THE ADJACENT BRIDGING BAR, THE BOLT COUPLED BRACKET AND BRIDGING BAR BEING RELATIVELY MOVABLE, AND A PLURALITY OF SPRING LOADED PINS SUPPOSRTED BY AND AROUND THE SECOND FRAME AND PRESSED AGAINST THE DOOR AROUND AND ADJECENT TO THE PERIMETER OF THE LATTER, THE MOVABLE RELATIONSHIP OF THE BRACKET AND BRIDGING BAR PERMITTING THE SECOND FRAME TO MOVE TOWARD THE DOOR UPON ROTATION OF THE TREATEDED SLEEVES IN ONE DIRECTION ON THE STUDS. 